Baryon Asymmetry: Why is Matter More Abundant?

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Baryon asymmetry refers to the observed abundance of matter over antimatter in the universe, raising questions about why they should be equal. The discussion highlights that during the radiation era, matter condensed from radiation, suggesting a mechanism for this imbalance. It emphasizes that colliding photons can produce equal amounts of particles and their corresponding antiparticles, as predicted by the standard model of particle physics. The conversation seeks to identify the governing laws or mechanisms that could explain the observed disparity. Understanding baryon asymmetry is crucial for comprehending the fundamental structure of the universe.
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Its said that matter is more abundant than antimatter in observable universe and hence comes the baryon asymmetry...but why matter and antimatter should be equal in amount...which law governs this?
 
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Matter "condensed" out of radiation (think radiation era). We know two colliding photons will pair produce given the correct energy to produce a particle and its corresponding anti-particle - this would yield exactly similar quantities for antimatter and matter from the standard model.
 
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